Constructing surface micro-electric fields on hollow single-atom cobalt catalyst for ultrafast and anti-interference advanced oxidation

Electron Transfer Trade-offs in MOF-Derived Cobalt-Embedded Nitrogen-Doped Carbon Nanotubes Boost Catalytic Ozonation for Gaseous Sulfur-Containing VOC Elimination

“…An obvious wide peak appeared near 23°, corresponding to the (002) crystal plane of amorphous graphite carbon, indicating that the organic matter in ZIF-67 was continuously decomposed and carbonized during calcination, and finally the graphitization morphology appeared. This is consistent with the formation of the previously reported ZIFs catalyst . In Figure f, solid-state electron paramagnetic resonance (EPR) spectra confirmed that the Co@NCNT-800 catalyst had an obvious unpaired electron signal at g = 2.005, and the signal of the Co@NC catalyst ( g = 2.070) disappeared, indicating that the surface has more free lone pair electrons and has stronger catalytic ozonation ability .…”

“…This is consistent with the formation of the previously reported ZIFs catalyst. 31 In Figure 1f, solid-state electron paramagnetic resonance (EPR) spectra confirmed that the Co@NCNT-800 catalyst had an obvious unpaired electron signal at g = 2.005, and the signal of the Co@NC catalyst (g = 2.070) disappeared, indicating that the surface has more free lone pair electrons and has stronger catalytic ozonation ability. 6 Fourier transform infrared spectroscopy (FTIR) was used to further study the chemical bonds and surface functional groups of the catalysts (Figure 1g).…”

Single-Atom Cobalt Catalysts Encapsulating Cobalt Nanoparticles with Built-In Electric Field for Ultrafast and Lasting Peroxymonosulfate Activation

“…The Co Kedge XANES spectrum that the chemical state of the Co atom in LIC-7 is between 0 and +2, as indicated by the absorption edge position located between the Co foil and CoO (Figure 2e). 41 As shown in Figure 2f, the Fourier transform extended X-ray absorption fine structure (FT-EXAFS) spectrum of LIC-7 exhibited a dominant peak of about 1.58 Å, which can be attributed to the Co−N coordination formed by the N atoms and Co-SAs or Co-NPs in the carbon matrix. 42 In contrast, the Co foil, CoO, and CoPc counterparts showed higher intensity peaks at 2.2, 2.6, and 1.5 Å, corresponding to Co−Co, Co−O, and Co−N bonds.…”

Accelerated Fenton degradation of azo dye wastewater via a novel Z-scheme CoFeN-g-C3N4 heterojunction photocatalyst with excellent charge transfer under visible light irradiation

“…† The low concentration of Cl − can promote the catalytic degradation process, which may be because MO is adsorbed to the catalyst surface through the salting-out effect, which reduces the time for the active species to reach MO, thereby improving the degradation performance of CFN-CN1. 40 When the Cl − concentration was increased to 10 and 20 mM, the degradation performance of the catalyst for MO decreased. Excess Cl − can form complexes with iron ions and reduce the utilization efficiency of the catalyst, thus inhibiting the degradation process of CFN-CN1 to MO.…”